If you've got an Apple device—iPhone, iPad, Mac, Watch—you REALLY need to install the latest software update RIGHT NOW. Malware has been detected in the wild that can install the NSO Pegasus spyware on your machine without any user interaction: https://arstechnica.com/gadgets/2023/09/apple-patches-clickless-0-day-image-processing-vulnerability-in-ios-macos/

If you can't updatte right now, enabling Lockdown Mode (in Settings➛Privacy & Security on iOS) will block the spyware from doing anything, at a cost in device usefulness.